Definition of "middy" [mid•dy]

• Informal A midshipman. (noun)
• A middy blouse. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "_Fatima_, the first swab, as I told you, got an ugly scrape in the leg that prevented him from moving; so when the second lieutenant was put in charge of the dhow to take her up to Zanzibar, I was the only responsible man the captain could think of to send cruising with the pinnace, as the middy was a harum-scarum youngster, who hadn't got thought enough, and neither the boatswain nor Chips could be taken away from their duties without perhaps the ship suffering."
• "Down a "middy" of Tooheys New (a downmarket brew but perfect for this pub) to whet your appetite for lunch."
• "She's gone in for dress reform now, you know, a kind of middy blouse made out of a striped portière with a kilted skirt of the same material and a Scotch cap."